Yup, adding 1R in parallel with the 0.1R sense resistor already on the board increases the LED current to about 2.4A (average during 'on' period) peaking at about 2.6A, and the overall supply current to about 2.4-2.5A, i.e. 10% more as expected. I would go further, but I've just noticed the inductor gets quite warm. Time to source a new (bigger) one...